Figure 5From: Automated evaluation of autoantibodies on human epithelial-2 cells as an approach to standardize cell-based immunofluorescence testsComparison of positive and negative findings of 1,222 patient sera referred to a routine university laboratory (white bars) and a private laboratory (black bars). Negative samples demonstrated titers below 1 in 80, weak positive samples 1 in 80 or 1 in 160, and positive samples 1 in 320 or above.Back to article page